Correlates of sedentary time in different age groups: results from a large cross sectional Dutch survey.

Background: Evidence shows that prolonged sitting is associated with an increased risk of mortality, independent of physical activity (PA). The aim of the study was to identify correlates of sedentary time (ST) in different age groups and day types (i.e.

Longitudinal Relationship Between Sitting Time on a Working Day and Vitality, Work Performance, Presenteeism, and Sickness Absence.

Objective: The aim of this study was to explore the longitudinal relationship between sitting time on a working day and vitality, work performance, presenteeism, and sickness absence.

Methods: At the start and end of a five-month intervention program at the workplace, as well as 10 months after the intervention, sitting time and work-related outcomes were measured using a standardized self-administered questionnaire and company records. Generalized linear mixed models were used to estimate the longitudinal relationship between sitting time and work-related outcomes, and possible interaction effects over time.

Cross-cultural adaptation of the Individual Work Performance Questionnaire.

Background: The Individual Work Performance Questionnaire (IWPQ), measuring task performance, contextual performance, and counterproductive work behavior, was developed in The Netherlands.

Objectives: To cross-culturally adapt the IWPQ from the Dutch to the American-English language, and assess the questionnaire's internal consistency and content validity in the American-English context.

Methods: A five stage translation and adaptation process was used: forward translation, synthesis, back-translation, expert committee review, and pilot-testing.

Improving the Individual Work Performance Questionnaire using Rasch analysis.

Recently, the Individual Work Performance Questionnaire (IWPQ) version 0.2 was developed using Rasch analysis. The goal of the current study was to improve targeting of the IWPQ scales by including additional items.

Responsiveness of the individual work performance questionnaire.

Background: Individual work performance is an important outcome measure in studies in the workplace. Nevertheless, its conceptualization and measurement has proven challenging. To overcome limitations of existing scales, the Individual Work Performance Questionnaire (IWPQ) was recently developed.

Construct validity of the individual work performance questionnaire.

Objective: To examine the construct validity of the Individual Work Performance Questionnaire (IWPQ).

Methods: A total of 1424 Dutch workers from three occupational sectors (blue, pink, and white collar) participated in the study. First, IWPQ scores were correlated with related constructs (convergent validity).

Measuring individual work performance: identifying and selecting indicators.

Background: Theoretically, individual work performance (IWP) can be divided into four dimensions: task performance, contextual performance, adaptive performance, and counterproductive work behavior. However, there is no consensus on the indicators used to measure these dimensions.

Objective: This study was designed to (1) identify indicators for each dimension, (2) select the most relevant indicators, and (3) determine the relative weight of each dimension in ratings of work performance.

Conceptual frameworks of individual work performance: a systematic review.

Objective: Individual work performance is differently conceptualized and operationalized in different disciplines. The aim of the current review was twofold: (1) identifying conceptual frameworks of individual work performance and (2) integrating these to reach a heuristic conceptual framework.

Methods: A systematic review was conducted in medical, psychological, and management databases.

The cost-effectiveness of a lifestyle physical activity intervention in addition to a work style intervention on recovery from neck and upper limb symptoms and pain reduction in computer workers.

Objectives: To evaluate the cost-effectiveness of a work style (WS) intervention and a work style plus physical activity (WSPA) intervention in computer workers with neck and upper limb symptoms compared with usual care.

Methods: An economic evaluation was conducted from an employer's perspective and alongside a randomised controlled trial in which 466 computer workers with neck and upper limb symptoms were randomised to a WS group (N = 152), a WSPA group (N = 156) or a usual care group (N=158). Total costs were compared to the effects on recovery and pain intensity.

Improving work style behavior in computer workers with neck and upper limb symptoms.

Introduction: The goal of this study was to assess the effectiveness of a group-based interactive work style intervention in improving work style behavior.

Methods: Computer workers with neck and upper limb symptoms were randomised into the work style group (WS, N = 152), the work style and physical activity group (WSPA, N = 156), or the usual care group (N = 158). Both intervention groups received the same work style intervention but the WSPA group also received a lifestyle physical activity intervention.

The effectiveness of a work style intervention and a lifestyle physical activity intervention on the recovery from neck and upper limb symptoms in computer workers.

This study assessed the effectiveness of a single intervention targeting work style and a combined intervention targeting work style and physical activity on the recovery from neck and upper limb symptoms. Computer workers with frequent or long-term neck and upper limb symptoms were randomised into the work style group (WS, n=152), work style and physical activity group (WSPA, n=156), or usual care group (n=158). The WS and WSPA group attended six group meetings.

Physical activity, cardiorespiratory fitness, and body mass index in relationship to work productivity and sickness absence in computer workers with preexisting neck and upper limb symptoms.

Objective: The purpose of this study was to investigate associations among three modifiable risk factors (ie, physical activity, cardiorespiratory fitness, and body mass index), work productivity, and sickness absence in computer workers.

Methods: All participants were computer workers with neck and upper limb symptoms in the preceding 6 months, the last 2 weeks, or both. Productivity and sickness absence were assessed with the Health and Performance Questionnaire (HPQ).

The (cost-)effectiveness of a lifestyle physical activity intervention in addition to a work style intervention on the recovery from neck and upper limb symptoms in computer workers.

Background: Neck and upper limb symptoms are frequently reported by computer workers. Work style interventions are most commonly used to reduce work-related neck and upper limb symptoms but lifestyle physical activity interventions are becoming more popular to enhance workers health and reduce work-related symptoms. A combined approach targeting work style and lifestyle physical activity seems promising, but little is known on the effectiveness of such combined interventions.

In a prospective study in young people, associations between changes in smoking behavior and risk factors for cardiovascular disease were complex.

Objective: This study investigates how voluntary changes in tobacco consumption are related to changes in biological risk factors for cardiovascular disease in 21- to 36-year-old men and women.

Study Design And Setting: Data of the Amsterdam Growth and Health Longitudinal Study (AGAHLS) were used to study the association between voluntary changes in tobacco consumption and changes in biological risk factors for cardiovascular disease (CVD) during 4-6 years of follow-up in 165 men and 195 women aged 21-36 years. We used multiple linear regression analyses with corrections for age and changes in other lifestyles.

Comparison between self-report and a dipstick method (NicCheck 1) to assess nicotine intake.

The purpose of this study was to investigate the agreement between self-reported tobacco consumption and NicCheck 1 (Dynagen Inc. Cambridge, Mass., USA) regarding smoking status and nicotine intake in a population of smokers (20.

Smoking and quantitative ultrasound parameters in the calcaneus in 36-year-old men and women.

Little is known regarding the association between smoking and quantitative ultrasound (QUS) parameters. Broadband ultrasound attenuation (BUA) and speed of sound (SOS) are believed to provide information on bone quality besides information on bone mineral density (BMD). The aim of this study was to investigate (1) current tobacco smoking; (2) lifetime tobacco smoking; and (3) years since smoking cessation, in relation to QUS and BMD parameters in 36-year-old men and women.

A longitudinal study on smoking in relationship to fitness and heart rate response.

Purpose: Smoking has been shown to be associated with impaired cardiovascular fitness and reduced heart rate response to exercise. It is not known whether these associations are present in adolescence and young adults, and whether they change over time.

Methods: Maximal oxygen uptake ([OV0312]O(2max)), maximum treadmill slope (Slope(max)), resting heart rate (HR(rest)), heart rate at submaximal exercise (HR(submax)), heart rate reserve (HRR), and maximum heart rate (HR(max)) were measured one to nine times between ages 13 and 36 in 298 male and 334 female participants of the Amsterdam Growth and Health Longitudinal Study.